3Fe(2+) + 6Na(+) + 2PO4(3-) + 3 SO4(2-) = Fe3(PO4)2 + 6Na(+) + 3SO4(2-)
3Fe(2+) + 2PO4(3-) = Fe3(PO4)2
Rb2SO3 + H2O = RbOH + RbHSO3
2Rb(+) + SO3(2-) + H2O <=> 2Rb(+) + HSO3(-) + OH(-)
SO3(2-) + H2O <=> HSO3(-) + OH(-)
Rb2SO3 = 2Rb(+) + SO3(2-) (electrolites and dissociation)
Hydrolysis of weak acid and strong base
OH(-) is formed in process ==> pH > 7 (basic solution)
"соль которая образуется в конце полного гидролиза."
Full hydrolysis (2 steps) Rb2SO3 + 2H2O = 2RbOH + "H2SO3"
How you can see, <span>salts doesn't formed in full hydrolysis.</span>
<span> Ca3(PO4)2 + 2H2O = 2Ca(HPO4) + Ca(OH)2</span>
Ca3(PO4)2 + 2H2O = 3Ca(2+) + 2HPO4(2-) + 2OH(-)
OH(-) is formed in process ==> pH > 7 (basic solution)
Ca(2+) and PO4(3-) - electrolites
<span>диссоциацию солей на ионы.</span>
<span>Ca3(PO4)2 - weak electrolite</span>
<span>Ca3(PO4)2 <==> 3Ca(2+) + 2PO4(3-), Ks = 1*10^-25 , T=298K</span>
<span>Hydrolysis of weak acid and strong base</span>
<span>Full hydrolysis (3 steps) Ca3(PO4)2 + 6H2O = 3Ca(OH)2 + 2H3PO4</span>
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<span>2CaCO3 + 2H2O = Ca(HCO3)2 + Ca(OH)2</span>
<span>2CaCO3 + 2H2O = 2Ca(2+) + 2OH(-) + 2HCO3(-)</span>
<span>OH(-) is formed in process ==> pH > 7 (basic solution)</span>
<span>Ca(2+) and CO3(2-) - electrolites</span>
CaCO3 - weak electrolite
CaCO3 <==> Ca(2+) + CO3(2-) , Ks = 4,9*10^-9 , T=298K
Hydrolysis of weak acid and strong base
Full hydrolysis (2 steps) CaCO3 +2H2O = Ca(OH)2 + "H2CO3"
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